What does the Bible say about salvation being God's work?

Scripture is clear that salvation is entirely the work of God. In Isaiah 48:3-5, God declares that He has shown His redemptive plan and acted upon it, ensuring His purposes are fulfilled. In Ephesians 2:8-9, Paul emphasizes that we are saved by grace through faith, which is not of ourselves; it is the gift of God, not of works, lest any man should boast. This underscores the reality that salvation originates with God, is accomplished through Christ, and is applied to our hearts by the Holy Spirit, firmly establishing that we contribute nothing to our salvation.